Node Jimp | scale

Introduction : The scale() function is an inbuilt function in Nodejs | Jimp which uniformly scales the image by a factor.

Syntax:

scale(scale, mode, cb)

Parameter:

• scale – This parameter stores the scaling factor of the image.
• mode – This is optional parameter which stores the scaling method.
• cb – This is optional parameter which is invoked when compilation is complete.

Input Images:

Setup Environment : 

npm init -y

Install Dependencies :

npm install jimp 

Example 1:

javascript

// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');

// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
   https://media.geeksforgeeks.org/wp-content/uploads/20190328185307/gfg28.png');
// scale Function having scaling factor as 0.2
  image.scale(.2)
  .write('scale1.png');
}

main();
  console.log('Image Processing Completed');

Output:

Example 2: With mode and cb (optional parameters)

javascript

// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');

// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
   https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');
// scale Function having scaling-factor, mode and callback function
  image.scale(3, Jimp.RESIZE_BEZIER, function(err){
    if (err) throw err;
  })
  .write('scale2.png');
}

main();
  console.log('Image Processing Completed');

Output:

Reference: https://www.npmjs.com/package/jimp